Marvin Preuss
d095180eb4
All checks were successful
continuous-integration/drone/push Build is passing
52 lines
1.4 KiB
Markdown
52 lines
1.4 KiB
Markdown
[](https://circleci.com/gh/charithe/durationcheck)
|
|
|
|
|
|
|
|
Duration Check
|
|
===============
|
|
|
|
A Go linter to detect cases where two `time.Duration` values are being multiplied in possibly erroneous ways.
|
|
|
|
Consider the following (highly contrived) code:
|
|
|
|
```go
|
|
func waitForSeconds(someDuration time.Duration) {
|
|
timeToWait := someDuration * time.Second
|
|
fmt.Printf("Waiting for %s\n", timeToWait)
|
|
}
|
|
|
|
func main() {
|
|
waitForSeconds(5) // waits for 5 seconds
|
|
waitForSeconds(5 * time.Second) // waits for 1388888h 53m 20s
|
|
}
|
|
```
|
|
|
|
Both invocations of the function are syntactically correct but the second one is probably not what most people want.
|
|
In this contrived example it is quite easy to spot the mistake. However, if the incorrect `waitForSeconds` invocation is
|
|
nested deep within a complex piece of code that runs in the background, the mistake could go unnoticed for months (which
|
|
is exactly what happened in a production backend system of fairly well-known software service).
|
|
|
|
|
|
See the [test cases](testdata/src/a/a.go) for more examples of the types of errors detected by the linter.
|
|
|
|
|
|
Installation
|
|
-------------
|
|
|
|
Requires Go 1.11 or above.
|
|
|
|
```
|
|
go get -u github.com/charithe/durationcheck/cmd/durationcheck
|
|
```
|
|
|
|
Usage
|
|
-----
|
|
|
|
Invoke `durationcheck` with your package name
|
|
|
|
```
|
|
durationcheck ./...
|
|
# or
|
|
durationcheck github.com/you/yourproject/...
|
|
```
|